19 IS] The Lactarias of Xortii Carolina 59 



L. helvus and L. rimosellus are the same. Compared with four o-ood 

 plants from the type collection of L. rimo.sellus that Dr. House has 

 been so kind as to send me, the i)lants appear identical in every respect, 

 as much so as if they had been gathered from the same colony. The 

 spores, also, are exactly alike, being subspherical, most about 6.6-7 

 X 7.2-7.5/x, and with more spine-like papillae than in those of L. helvus 

 from Miss Burlingham, in whicli the spores are more elliptic and the 

 warts more bhmt and low. Lactarius helvus is, moreover, a larger 

 plant than ours, and the gill color is diiferent in the dry state. Peck's 

 plants are decidedly odorous in the dried state, and so are ours (in 

 this respect not differing from L. helvus, unless the odor be somewhat 

 different). Plate 28 shows the largest plant of this species we have 

 found Jn Chapel Hill. 



76. Low places east of athletic field, September 25. 1908. 

 547. On mossy ground near Battle's Brook, October 10, 1912. 



1164. Just below sphagnum moss bed, low woods, July 20, 1914. Spores 

 5.6-6.4^. Photo. 



1173. Near sphagnum bed east of athletic field, July 21, 1914. Photo. 



1203. In several places along Battle's Branch, wet sandy places, just above 

 water, July 24, 1914. 



1594. By path along Meeting of the Waters Branch, near one-quarter mile 

 west of Meeting of the Waters, July 9, 1915. Spores spherical, papil- 

 late (some less so), 6.3-7.2 „ in diameter. 



1753. Low, damp, shaded spot at base of Lone Pine Hill, September 12, 1915. 



2357. On a rotting deciduous log. woods, July 3, 1916. Cap surface broken 

 up into small squamulose-looking areas. 



50. Lactarius subdulcis (Pers.) Fr.* 



Plate 39. 

 Cap 1.5-5.3 cm. broad, at times irregular, soon depressed in center, 

 not papillate or umbonate, the margin elevated or nearly plane, in- 



*Lactarius sp.? 



We have one collection of a tall slender plant growing on wood that we 

 have not yet been able to determine. We have found no other Lactarius 

 growing on wood except L. rimosellus (rarely), and that is easily different 

 with its rimose and velvety cap and different color of gills, particularly when 

 dry. Lactarius subdulcis has less spherical spores and different color (very 

 different when dry), and L. camphoratus has a strong odor. Lactarius Jiijni- 

 otus var. tenuipes has been found on wood in spruco woods in Vermont, but 



